graph/db+sqldb: impl DisabledChannelIDs

Which lets us run `TestDisabledChannelIDs` against our SQL DB backends.

Author: ellemouton

docs/release-notes/release-notes-0.20.0.md

@@ -87,6 +87,7 @@ circuit. The indices are only available for forwarding events saved after v0.20.
     * [5](https://github.com/lightningnetwork/lnd/pull/9935)
     * [6](https://github.com/lightningnetwork/lnd/pull/9936)
     * [7](https://github.com/lightningnetwork/lnd/pull/9937)
+    * [8](https://github.com/lightningnetwork/lnd/pull/9938)
 
 ## RPC Updates
 

graph/db/graph_test.go

@@ -3592,7 +3592,7 @@ func TestDisabledChannelIDs(t *testing.T) {
 	t.Parallel()
 	ctx := context.Background()
 
-	graph := MakeTestGraph(t)
+	graph := MakeTestGraphNew(t)
 
 	// Create first node and add it to the graph.
 	node1 := createTestVertex(t)
@@ -3608,6 +3608,7 @@ func TestDisabledChannelIDs(t *testing.T) {
 
 	// Adding a new channel edge to the graph.
 	edgeInfo, edge1, edge2 := createChannelEdge(node1, node2)
+	node2.LastUpdate = time.Unix(nextUpdateTime(), 0)
 	if err := graph.AddLightningNode(ctx, node2); err != nil {
 		t.Fatalf("unable to add node: %v", err)
 	}

graph/db/sql_store.go

@@ -109,6 +109,7 @@ type SQLQueries interface {
 	*/
 	UpsertEdgePolicy(ctx context.Context, arg sqlc.UpsertEdgePolicyParams) (int64, error)
 	GetChannelPolicyByChannelAndNode(ctx context.Context, arg sqlc.GetChannelPolicyByChannelAndNodeParams) (sqlc.ChannelPolicy, error)
+	GetV1DisabledSCIDs(ctx context.Context) ([][]byte, error)
 
 	InsertChanPolicyExtraType(ctx context.Context, arg sqlc.InsertChanPolicyExtraTypeParams) error
 	GetChannelPolicyExtraTypes(ctx context.Context, arg sqlc.GetChannelPolicyExtraTypesParams) ([]sqlc.GetChannelPolicyExtraTypesRow, error)
@@ -372,6 +373,35 @@ func (s *SQLStore) FetchNodeFeatures(nodePub route.Vertex) (
 	return fetchNodeFeatures(ctx, s.db, nodePub)
 }
 
+// DisabledChannelIDs returns the channel ids of disabled channels.
+// A channel is disabled when two of the associated ChanelEdgePolicies
+// have their disabled bit on.
+//
+// NOTE: part of the V1Store interface.
+func (s *SQLStore) DisabledChannelIDs() ([]uint64, error) {
+	var (
+		ctx     = context.TODO()
+		chanIDs []uint64
+	)
+	err := s.db.ExecTx(ctx, sqldb.ReadTxOpt(), func(db SQLQueries) error {
+		dbChanIDs, err := db.GetV1DisabledSCIDs(ctx)
+		if err != nil {
+			return fmt.Errorf("unable to fetch disabled "+
+				"channels: %w", err)
+		}
+
+		chanIDs = fn.Map(dbChanIDs, byteOrder.Uint64)
+
+		return nil
+	}, sqldb.NoOpReset)
+	if err != nil {
+		return nil, fmt.Errorf("unable to fetch disabled channels: %w",
+			err)
+	}
+
+	return chanIDs, nil
+}
+
 // LookupAlias attempts to return the alias as advertised by the target node.
 //
 // NOTE: part of the V1Store interface.

sqldb/sqlc/graph.sql.go

@@ -573,6 +573,19 @@ JOIN channel_policy_extra_types cpet
 ON cp.id = cpet.channel_policy_id
 WHERE cp.id = $1 OR cp.id = $2;
 
+-- name: GetV1DisabledSCIDs :many
+SELECT c.scid
+FROM channels c
+    JOIN channel_policies cp ON cp.channel_id = c.id
+-- NOTE: this is V1 specific since for V1, disabled is a
+-- simple, single boolean. The proposed V2 policy
+-- structure will have a more complex disabled bit vector
+-- and so the query for V2 may differ.
+WHERE cp.disabled = true
+AND c.version = 1
+GROUP BY c.scid
+HAVING COUNT(*) > 1;
+
 -- name: DeleteChannelPolicyExtraTypes :exec
 DELETE FROM channel_policy_extra_types
 WHERE channel_policy_id = $1;